Inking mechanism of presses printing from intaglio printing-surfaces.



H. PEARCE, T. R. GfPARKBR & F. W. WRIGHT. INKING MECHANISM OF PRBSSES PRINTING FROM INTAGLIO PRINTING SURFACES.

APPLICATION FILED MAR. 27. 1913.

1. 1 01 325 Patented June 23, 1914.

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H. PEARGE,-T. R. G. PARKER & P. w. WRIGHT. INKING MECHANISM OF PRESSBS PRINTING FROM INTAGLIO PRINTING SURFACES.

APPLICATION FILED MAR. 27, 1913.

. 2 SHEETS-SHEET 2.

Patented June 23, 1914.

. UNITED STATES PATENT OFFICE.

HERBERT PEARCE, THOMAS ROBERT GILLETT PARKER, AND FRED WESLEY WRIGHT, 0F IBROADHEATI-I, ENGLAND, ASSIGZNORS TO LINQTYPE AND MACHINERY LIMITED,

OF LONDON, ENGLAND.

INKING MECHANISM OF PRESSES PRINTING FROM INTAGLIO PRINTING-SURFACES.

Specification of Letters Patent.

Patented June 23, 1914.

Application filed March 27, 1913. Serial No. 757,110.

To all whom it may concern:

Be it known that we, HERBERT PEARCE, THOMAS ROBERT GILLETT PARKER, and FRED WEsLEY WRIGHT, subjects of the King of the United Kingdom of Great Britain and Ireland, residing at Linotype and Machinery lVorks, Broadheath, in the county of Chester, England, have invented new and useful Improvements in or Relating to Inking Mechanism of Presses Printing from Intaglio Printing-Surfaces, of which the following is a specification.

This invention relates to improvements in the inking mechanism of presses printing from intaglio printing surfaces, such presses being hereinafter referred to as intaglio printing presses, and has for its object to enable such mechanism to work the ink into the engraved printing surfaces more efliciently than has heretofore been possible with existing arrangements.

The invention may be said to consist in the employment of a plurality of inking rollers which rotate all in the same direction at different peripheral speeds relatively to each other and one or more of which rotates at a different peripheral speed relatively to the surface speed of the engraved printing surface to which they convey the ink, and which surface travels in the same direction as that traveled by the parts of the inking rollers in contact therewith.

The engraved printing surface, so far as the present invention is concerned, may be either fiat as in fiat bed printing and die presses, or curved as in rotary presses, and for convenience, the invention is hereinafter described and illustrated in connection with the latter arrangement, that is to say, the arrangement in which the engraved plate is mounted on a cylinder, and one in which two inking rollers only are employed.

The invention will be best understoodby reference to the accompanying diagrammatic drawings, which are to be taken as part of this specification and read therewith.

Of these drawings, Figures 1, 2, 3 and 4: respectively represent four different arrangements according to the present invention.

Throughout the several figures of the drawings, like or corresponding parts are indicated by similar reference numerals, and the directions of rotation of the respective cylinders and inking rollers are indicated by the arrows appearing thereon.

In all the four figures, 1 represents the plate cylinder and 2, 8, the two above-named inking rollers, the former rotating at a higher speed than the latter, the said inking rollers for this reason, being hereinafter referred to as respectively the higher-speed inking roller and the lower-speed inking roller.

Referring now specifically to the arrangement shown in Fig. 1, 4 is the ink fountain, 5 the ink fountain roller, 6 the distributer roller and 7 the intermediate distributer or vibrator roller appertaining to the higher speed inking roller 2, and 8 and 9 are the distributer roller and intermediate distributer or vibrator roller respectively appertaining to the lower speed inking roller 3.

10 is an ink ductor roller adapted to be swung by any of the known means alternately into contact with the ink fountain roller 5 and a second ink ductor roller 11 which latter is adapted to be swung by any convenient mechanism alternately into con tact with the two ink distributer rollers 6, 8. The ductor roller 10 makes contact with the ductor roller 11 preferably at the times at which the latter is in contact with the distributer rollers 6 and 8 respectively, but this contact can be made during the movement of the said ductor roller 11 from one to the other of the rollers 6, 8. The intermediate rollers 7 and 9 are each in constant peripheral contact with the respectively adjacent rollers 6 and 2, and 8 and 8, and each one is moreover reciprocated longitudinally in the manner common to what are lmown as vibrator rollers.

In view of the fact that the two distributer rollers 6, 8, are, like the respective inking rollers 2, 3, rotated at relatively different speeds, the ductor roller 10 cannot obviously be brought into contact with both of them at the same time, and it is for that reason that the second ductor roller 11 is provided, and arranged to make contact with the said rollers 6, 8 alternately. When, during the contact of the second ductor roller 11 with the distributer roller 6, the first ductor roller 10 makes contact with and conveys ink to the said roller 11, this ink, in turn, is transferred by the intermediate roller 7 to the higher speed distributor roller 2, and when, during the contact of the second ductor roller 11 with the distributer roller 8, the first ductor roller 10 conveys ink to it from the ink fountain roller 5, this ink is transferred by the intermediate roller 9 to the lower speed distributer roller 3.

The cylinder 1 in each of the examples illustrated and as viewed from the side of the press represented in the drawings, is rotated anti-clockwise and the ink rollers 2, 3 are rotated clockwise so that the respective contacting surfaces travel in the same direction. Of the two inking rollers 2, 3, the former (2), rotating at a higher peripheral speed than the therewith-contacting surface of the engraved plate 12 on the cylinder 1, may be regarded as driving the ink forward into the engraved interstices of the said plate, while the other roller (3), rotating at a slower speed, may be regarded as serving to complete the filling in of any parts of those interstices which may have been left improperly filled by the quicker rotating roller 2, thus insuring most efficient inking of the plate. While, as hereinbefore described, the two inking rollers 2, 3, rotate at relatively different peripheral speeds, and one of them, namely the roller 2, rotates at a peripheral speed greater than the surface speed of the plate 12, the other roller may be rotated at a peripheral speed which is either greater or less than the surface speed of the said plate.

Instead of the second ductor roller 11 receiving ink from the first ductor roller 10 as hereinbefore described with reference to Fig. 1, the two ductor rollers may act independently of each other, as shown, for example, in Fig. 2. In this arrangement the ductor roller 13 is swung alternately into contact with the ink fountain roller 5, as shown in full lines, and the adjacent distributer roller 8, as shown in dot and-dash lines, and the ductor roller 14, is swung alternately into contact with the ink fountain roller 5, as shown in dot-and-dash lines, and the distributer roller 6, as shown in full lines, the two ductor rollers 13, 14, being arranged to make contact with the ink fountain roller 5 in alternation. Or, as shown in Fig. 3, there may be as many ink fountains as there are different peripheral speeds of the inking rollers; the arrangement shown Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

1a or 13, as will be readily understood without further description. Again, as indicated in Fig. at, a single ink fountain 4 and a single ductor roller 10 may be used to supply two sets of differential speed inking rollers in alternation. In this case the ductor roller 10 first contacts with the ink fountain roller 5 and then with say the higher speed distributer roller 7 and then contacts again with the ink fountain roller 5 and thereafter with the lower speed dis- 1 tributer roller 9.

Having described our invention, we declare that what we claim and desire to secure by Letters Patent is 1. In an intaglio printing press, the combination with a printing surface, of a plurality of inking rollers therefor, rotating all in the same direction at different peripheral speeds relatively to each other, and of which one at least rotates at a different peripheral speed relatively to the speed of the printing surface with which it contacts, the contacting parts of the said inking rollers and printing surface, traveling in the same direction.

2. In an intaglio printing press, the combination with a printing surface, of a plurality of inking rollers therefor, rotating all in the same direction at different peripheral speeds relatively to each other and of which one at least rotates at a different peripheral speed relatively to the speed of the printing surface with which it contacts, and a single ink fountain from which ink is supplied to all the rollers of the said plurality, of two ductor rollers one adapted to convey ink to the other from the fountain and the said other ductor roller adapted to supply ink to the inking rollers in turn.

In witness whereof we have hereunto set our hands in the presence of two witnesses.

HERBERT PEARCE. THOMAS ROBERT GILLETT PARKER. FRED WESLEY WRIGHT. lVitnesses 7M. E. BENNISON, FRED SPENOE.

Washington, D. G. 

